Kelantan Trial 2025 Chemistry Kertas 1

What is meant by Green Technology?

Amy has a cold and an itchy nose. Amy's toes are also swollen and red. What kind of medicine can the doctor recommend to overcome this problem?

Diagram 1 shows the Lewis structure of compound X. Which of the following is the correct proton number for the pair of atoms that make up compound X?

Diagram 2 shows a part of the arrangement of the apparatus used to determine the empirical formula of metal oxide Y. The product of the reaction is copper and water. Which of the following is true about the reaction shown?

Table 1 shows the information of melting point and boiling point for four substances. What is the physical state of each substance at 30 °C?

J is a Group 1 element. What is the chemical formula formed when J reacts with element M. [Proton number M: 16]

Diagram 3 shows the chemical formula formed when element R reacts with a different element. Which of the following is a special characteristic of the element R? I. Can form coloured ions II. Has a shiny surface III. Can act as a catalyst IV. Exists as a solid at room temperature

Which of the following has the highest number of hydrogen ions per unit volume?

What mass of zinc nitrate salt is required to prepare 250 cm^3 of a 0.5 mol dm^-3 zinc nitrate solution? [Relative atomic mass : N=14, O=16, Zn=65]

The following is the chemical equation for a metal displacement reaction. > Mg + CuSO_4 -> MgSO_4 + Cu Which of the following is true about the chemical equation? I. The oxidation number of Mg changes from 0 to +2. II. Magnesium undergoes a reduction reaction III. Copper (II) ion accepts 2 electrons IV. Copper (II) ions are reducing agents.

Diagram 4 shows the structural formulas of two carbon compounds. Which of the following properties is correct for compound P and compound Q?

Which of the following factors will cause a reaction to occur and shape the outcome of the reaction? I. Reactant particles at high temperatures II. Collisions between particles occur at the correct orientation. III. Provides an alternative pathway with low activation energy. IV. The energy of the reactant particles must equal or exceed the activation energy.

Diagram 5 shows a magnetic resonance imaging machine, MRI that is widely used in the medical industry. Ceramic yttrium barium copper oxide, YBCO is used as one of the materials to ensure that the machine works well. What are the characteristics that make ceramic yttrium barium copper oxide, YBCO suitable to be used as an important material in the construction of the machine?

Diagram 6 shows the energy profile of a chemical reaction. Which of the following is the heat of reaction for the reaction?

Diagram 7 shows the monomer structural formula of a natural polymer. What is the name of the monomer according to IUPAC nomenclature?

Who introduced the Octaves Law in arranging elements in the Periodic Table of Elements?

Table 2 shows information about glass X and glass Y. What is glass X and glass Y?

What is the product formed when hydrogen gas and propene are passed over a nickel catalyst at temperature 180 °C?

Which substance forms yellow precipitate when added to lead (II) nitrate solution.

Diagram 8 shows the pH readings of two different solutions. Which of the following is true about solutions A and B?

Diagram 9 shows the apparatus set up for the electrolysis of 25 cm^3 of 1.0 mol dm^-3 copper (II) sulphate solution. After the reaction is complete, the blue color of the copper (II) sulfate solution turns colorless and there is a brown solid deposit on the carbon electrode. What is the mass of the carbon electrode after the reaction? [Relative atomic mass : C=12, O=16, S=32, Cu=64]

When excess zinc powder is added to 25 cm³ of a 0.2 mol dm⁻³ copper (II) sulphate solution, the temperature of the mixture increases from 30 °C to 40 °C. What is the heat of displacement for copper? [Spesific heat capacity of the solution = 4.2 J g⁻¹ °C⁻¹; Density of solution = 1 g cm⁻³]

Which of the following can react with 50 cm³ of 1.0 mol dm⁻³ potassium hydroxide solution until the final point of neutralization is reached without excess?

Table 3 shows a comparison of the physical properties of compound Q and compound R Which of the following is a possible compound of Q and R?

Diagram 10 shows the structural formula of a carbon compound. What is the name of the compound ?

Table 4 shows the composition of materials modified from pure metals to form a new material. What is the purpose of the modification? I. Helps prevent metal corrosion II. Metal is more ductile and easier to pull III. Increases the hardness of metals IV. Metals are easily malleable and can be formed into specific shapes.

Which of the following should be done to produce a high volume of hydrogen gas in a short time when excess zinc is added to 25 cm^3 of 1.0 mol dm^-3 nitric acid? I. Increase the volume of acid to 50 cm^3 II. Add a few drops of copper (II) sulfate solution III. Increase the mass of zinc used IV. Heat the reaction mixture to a higher temperature

Diagram 11 shows the structural formula of a commonly used type of detergent. Which of the following is true about the detergent in Diagram 11?

Which of the following has the largest atomic radius? [Proton number : Mg=12, Al=13, Cl=17, Ar=18]

Table 5 shows the thermometer readings when two substances are mixed together to react. What are those two substance?

Diagram 12 shows part of the structural formula of polymers used to make water pipes. What is the percentage of carbon atoms per molecule of the monomers that make up the polymer? [Relative atomic mass : H=1, C=12, Cl=35.5]

5.6 g of element M has undergone oxidation by receiving 2.4 g of oxygen and forming the oxide compound M with the formula M2O3. What is the relative atomic mass of the M ? [Relative atomic mass : O=16]

Diagram 13 shows a diagram of bond breaking and formation in a chemical reaction. The table below shows the energies of the chemical bonds in X, Y and XY. | Bond | Bond energy, kJ mol^-1 | | X – X | 436 | | Y – Y | 243 | | X – Y | 432 | What is the value of Q

Diagram 14 shows a standard representation of atom of element P. Which of the following atomic structure represents ion P?

Diagram 15 shows the observation for an electrolysis cell carried out using solution X. Given as part of the Standard Electrode Potential Series. | Reaction of half-cells | E° / V (298K) | Reaction of half-cells | E° / V (298K) | | Na$^+$ + 1e $\rightleftharpoons$ Na | - 2.71 | Cl$_2$ + 2e $\rightleftharpoons$ 2Cl$^-$ | + 1.36 | | 2H$^+$ + 2e $\rightleftharpoons$ H$_2$ | + 0.00 | Cu$^{2+}$ + 2e $\rightleftharpoons$ Cu | + 0.34 | | O$_2$ + 2H$_2$O + 4e $\rightleftharpoons$ 4OH$^-$ | + 0.40 | Ag$^+$ + 1e $\rightleftharpoons$ Ag | + 0.80 | | Pb$^{2+}$ + 2e $\rightleftharpoons$ Pb | - 0.13 | | | Solution X is maybe

Sodium hydroxide and ammonia solutions are used as reagents for a test to confirm the cations present in a salt. Table 6 shows the observations recorded when the test was carried out on a salt P. What cations might exist in a solution of a P salt? I. Al^3+ II. Zn^2+ III. Pb^2+ IV. Mg^2+

The following is the chemical equation for the decomposition of copper (II) nitrate when heated strongly. > 2Cu(NO_3)_2 -> 2CuO + 4NO_2 + O_2 Which of the following is true if 1.0 mol of copper (II) nitrate decomposes when heated? [Relative atomic mass : N=14, O=16, Cu=64 ; Molar volume of gas at room condition = 24 dm^3]

Diagram 16 shows a comparison of the electrical conductivity of two materials in the solid state. Which of the following is the best explanation for the observation shown in Diagram 16?

Table 7 shows observations on iron plated with metal Y. Observations were recorded when the plated surface was scratched and the iron was exposed to the environment. Metal Y maybe... I. Magnesium II. Aluminium III. Copper IV. Stanum

Diagram 17 shows the apparatus set up of an experiment to study the effect of size of reactant on the rate of reaction. State the observable and measurable in this experiment.